1set GU18 POT Ferrite Cores, transformer core,magnetic tank 18mm

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We use the Polyethylene foamed sheet to protect the ferrite cores and bobbins, then use the air column, don't worry!

GU18 Ferrite Cores

AL=2000±25%(nH/N^2)
"E" core size(mm): (the 3rd picture)
A: 18.0±0.3

1set =2 ferrite halves + 1 bobbin

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